How this bed’s quantity is calculated
This example uses a 37.5 ft measured open curved border with brick / paver · 8 in along border. Its geometry is measured path = 37.5 ft. The allowance is applied to the full-precision border length before any whole-unit rounding. Ten percent makes the buying target 41.25 ft. Each purchase unit provides 0.667 ft of nominal length; the eight-inch face is converted to 8 ÷ 12 ft without a joint gap.
Buying target: 37.5 × 1.10 = 41.25 ft
Material count: ceil(41.25 ÷ 0.667) = 62 bricks / pavers
Purchased coverage: 62 × 0.667 = 41.333 ft
The purchase supplies 41.333 ft of nominal coverage. That is 3.833 ft more than the installed border, including both the selected allowance and whole-package rounding. This is a stock balance, not a measured disposal amount. Short offcuts may be reusable, and unopened stock may remain as a spare. Use the actual product label to confirm what length is available after any joints or overlaps.
Fixing assumptions for this example
No spike count is assigned to this brick/paver preset. It represents one line of loose units with an eight-inch face along the border. If your design includes a separate spiked restraint strip, calculate its hardware separately. A second row, mortar gaps, a different orientation, or tight-curve cuts can change your material list.
Adapt the estimate to your own border
Check whether you need the complete perimeter or only a portion of it. For a bed against a wall, use the measured-border mode to enter only the edge being installed. Choose a different allowance if your cut plan or spare-stock decision differs from this ten percent example. Do not infer product suitability, prices, or installation performance from these quantities.